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# the Apache License, Version 2.0 (the "License"); you may
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# You may obtain a copy of the License at
#
#  http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

require 'singleton'

###
# This is a place for storing deprecation message which cannot deliver to user before log4j initialization.
# eg. command line flags deprecation warning. `bin/logstash --debug`
module LogStash
  class DeprecationMessage < Array
    include Singleton

    def self.instance
      @@instance ||= Array.new
    end
  end
end